Ebola History: An Overview
Ebola hemorrhagic fever (Ebola) is a highly contagious illness and is often fatal in nonhuman primates (chimpanzees, monkeys, and gorillas) and humans.
The cause of Ebola outbreaks is an infection with
the Ebola virus (see Ebola Pictures). Ebola virus got its name from a river in the Democratic Republic of the Congo (formerly Zaire), in Africa, where it was first recognized. There are four identified subtypes of Ebola virus. Three of the four have caused disease in humans:
- Ebola-Ivory Coast
- Ebola-Sudan
- Ebola-Zaire.
The fourth Ebola virus subtype, Ebola-Reston, has not caused disease in humans, but has in nonhuman primates.
Ever since Ebola first became recognized in 1976,
Ebola outbreaks have appeared sporadically. Confirmed cases of Ebola virus infections have been reported in:
- Gabon
- The Democratic Republic of the Congo
- Sudan
- The Ivory Coast
- The Republic of the Congo
- Uganda.
In the United States, no case of Ebola in humans has ever been reported. Ebola-Reston virus caused severe illness and death in monkeys imported to research facilities in the United States and Italy from the Philippines; during these Ebola outbreaks, several research workers became infected with the virus, but did not become ill.